-(IBAction)doImage:(id)sender
{
CGFloat screenWidth = [UIScreen mainScreen].bounds.size.width;
NSArray *mArray = @[@"1.jpeg",@"2.jpeg",@"3.jpeg",@"4.jpeg"];
for (int i = 0; i<mArray.count; i++) {
NSString *imageName = [mArray objectAtIndex:i];
UIImage *ig = [UIImage imageNamed:imageName];
UIImageView *mImageView = [[UIImageView alloc]initWithImage:ig];
mImageView.frame = CGRectMake(i*screenWidth, 0, screenWidth, 400);
[self.mScrollview addSubview:mImageView];
}
self.mScrollview.contentSize = CGSizeMake(mArray.count*screenWidth, 400);
self.mScrollview.frame = CGRectMake(0, 0, screenWidth, 400);
self.mScrollview.delegate = self;
self.mScrollview.pagingEnabled = YES;
self.mPageControl.currentPage = 0;
self.mPageControl.numberOfPages = mArray.count;
[self.mPageControl addTarget:self action:@selector(changePage:) forControlEvents:UIControlEventValueChanged];
}
-(void)scrollViewDidScroll:(UIScrollView *)scrollView
{
CGFloat pageWidth = scrollView.frame.size.width;
int page = floor((scrollView.contentOffset.x - pageWidth / 2) / pageWidth) + 1;
self.mPageControl.currentPage = page;
}
- (void)changePage:(id)sender
{
int page = self.mPageControl.currentPage;
CGRect frame = self.mScrollview.frame;
frame.origin.x = frame.size.width * page;
frame.origin.y = 0;
[self.mScrollview scrollRectToVisible:frame animated:YES];
}
原文：http://www.cnblogs.com/guligei/p/4419486.html